Most likely problem to this is that you have no C172 available in your ..\Prepar3D v4\SimObjects\Airplanes\ directory, so is wasn't ableto resolve the C172 and used one of the related models available.

Noted regarding the \Prepar3D v4\SimObjects\Airplanes\ directory. Is there a list or post that outlines how to setup the AI traffic for P3D to make the planes match the traffic in P3D? I am not sure how and which files to update.

The second question remains, how do I ensure the AI traffic in my sim matches PE AI traffic? For example, at many airports, I have AI traffic taking off in the opposite direction to which PE ATC advises me to depart. I would really like to know how to fix that.